Boiler fire box



April 10. 192s.

J. T. ANTHONY BOILER FIRE BOX Filed Dec. 26, 1922 2 Sheets-Sheet l nulli J. T. ANTHONY April l0, 1928.

BoILER FIRE Box Filed Dec. 26. 1922- 2 Sheets-Sheet 2 WTA/Ess Patented Apr. 10, 1928.

Bellen-FIRE 139x; ,I

.Y My invention relates/to''boileriireeljoxesJ and 1s more especially coneeinel with lr'e boxes for locomotive boilers'. A The lnvent'lon is `partculai'ly applicable-to 'file-boxes of the d 1n my UnitedStates .Petet N 0: 1,229;n

ine-filer explened iewifh eeeeiel're'ferenee .te

1 sueli' "e fire-*bem Amongst "die edfentegee tlet'l einer@ .Secure ere' @better erreneeileejrit` hea,tingr sr'feeeS-:Offthelife-19X- .and their.

, Passege te' the boiler- -fuee's 'leespexpee'ure ef sliseptible. pani-s 'Atolthe defperioratng influe.

o leaiiing.Av

,HOW-'these audi otheri Objeets ed' edv-e11- tegee :can be realized fhreeghf my .invention will become epileren@` 'from fmy" deedp'den j Fie 2 ,Shows e partlallhorizentel ,eeeifen teken. as. ndeetfed by the l'fne :2121 i111 ,Fgl,

.on eldneller- .Seele thenlFigf .l eind,

Figs; 3 and. e ,shew 'eiiees'seetene tlieedeh Referring to the.. ditavigngs. generally; it Willlloel s'eenrhat,dtowrardlthe 'rontihe boiler fire-'box shown has aftrnrsversewater leg.

nterconnect'ne. Aits fsi.de l'egrs or. lateral Wafer spaces l0.` Tlis Ktransverse"Water: 'leg 9 0c-` eludes the lower vportion ofthe iineboand Vdivides the interior of the latter into a large( rear, part or jfirejcliarigiberr A @nda smaller l forward p artf or ,combustion 'chamber The upper edge o fkfqliefwafer leg' 9 (See Figs; 3i and ourvesnpwrd toward either end,r

so thggttliene shall-benestare pockets 4at lits junetionwtligthe ireboxeide sheets l1.-` @As shown, the rear fire-box portion A is Wide;

` likewjeg tlidse in' lthe `end Wyter] leg; 9, lcogrzirleet'ing "che,v intermediate perblene 'eh'efeef 'edd the Wafer `epeeee peti' and of about the 'usual downi'iirdfifi'ing AT-ENT Perce v MAN-ARCH' l eoMrANY; A.l cozeeeRgATIoN 0F @ELAWAREL v l narrow' bottom' openingf 'lkliei weteliepeeee A:eleoelfthe Chembers'e .and B in I the sdes'of'tlgeehambep 'Bfwthf the water Slee-eee 'lOe the edee "ef the Chamber AL AS corners' of. @he fe-'boxendfof thermujd ring.

both" internally vandl -extferall'yisc'o as Fio'giye mue ring-greater widened' the' 'nel-ewedie @1re-beit the/reel1 by dreh 'eeppelxfingl somewhat' and enter' `Said Water gS'pCe" above" thev Afne docu-'116.V AS yshown,the turbesflfl,4

l5 are erlenged" n-diStinct-Asets or 'banke,

one above another, eachaWijh"LitjsffireperchA epilee et E fer upee'ed pee'eegie .ef eembuetied geees emedgef:th'eidbeein the reef 0f the-arches. lrhfe'se ziehesQV ,:1j8`jaie'not com; plete, however", louiv have felatively ofliset openings f,g-in themA to permit egnd canse the cembueugon gesagt@ timerse (imaxeversee between' the erelesrwhieh divergefeel'.- Werd Seme'Whe@'4 owing,- te. ihe-ge'etel" 11P- Wed' eervewre of` Zehe" nippel* tubes. 15- ,In the present? llstfelee; .elle epemllg-g f' in the central row of arch brick from between its middle tubes 14, While the opening g in the arch 18 is forinedby omission of side brick from between itsouter tubes and the firebox side sheets`11. Thus part ofthe combustion gases (products of .combustion-and Vstill burning gases) that rise to the lower arch 17 pass through its centralv opening Vdivide and pass t-ransversely .to` either side in` the passage H, and then pass upward through the lateral openings'g in the upper arch- 18.A

vAs these gases traverse the Vlower surfaceof i the arch 17- and the passage `H, they come [with .the main stream from V'ward' at'J over the arch 18.

intoV close Contact with thetubes 14 and 15; and asthey pass upward through the upper arch openings g, they are broughtinto thorough and intimatecontact with the tire-box sides 11. 'Moreover,morevcomplete combustion visjproducedibyv the eddyingV and thoroughV intermixture of the gases resulting {fromi'their broken course, and from the'in termingling of the ascendin streams at g passing` for- The'rfr'ont lire-box portionB has arefractory-floor 2() extending and inclined forward and downwa'rcl from the upperportion or A.edge `of=thetransversewater leg 9 tofthe cfire-box throat sheet 21 just below the lower- Y most of the boiler iiues 22. As shown, this iio'or 20. sformed'by ametal"v plate with i 'Y downward'flang'ed front and rear edges secured tothe throat sheet- 21and thewater legv9, and. covered withire-brick 23. This f floor 20, it'rwill be observed, continues the generaldownward slope ofthe Vupper arch 18. Thusthespace J over the sloping arch.

n 18, #the vopening Cover thewaterleg 9, and

the chamber B over the ioor 2Ov in effect,

constitute one continuous, extended Vfinal vvcombustion space or passage for the gases before they enter the iues 22. The;V progressive forward expansion of this combustion space-accommodates the increase involume of the gases with their risel in temperature due to the progressive and intensive combustionV in Y such space. The Vdownward-sloping Vrefractory floor V2() not only acts (like the arch 18) as aregenerative radiating wall to promote combustiornbut also obviates any sudden expansion of the gases. (owlng to a Vsudden increase in available space), with loss of velocity and'ofcontact withthe surroundingheating` surfaces of the boiler.y Owing, also, to the sustained velocityfof the gases, there is less'te'ndency lfor cinders tocollect inthe chamber B.V

FroniFigs. 1,3 and4, it Vwill be seen that upto and above the level at which the high-A estftubes 15 enter the transverse wat-er legl 9 the latter is inclined `upward and forward somewhat. This inclination of the water leg 9V not only facilitates access to the clean-out plugs loc'ated loppositethe tubes 14 and v15 ,in theforward wall of the water 1eg,-Vbe

Vward tothe throat neath the forward-sloping floor 20,--but also permits the tubes 14, 15 tohave some inclination rearward and upward immediately behind the water leg, whose front wall they should preferably enter at right angles. Such upward inclination ofthe tubes 14 and 15 from the water leg 9 rearward facilitates theentry of water 'into ythem and tends to prevent steam pocketing, which would more .readily occur just inside' the forward tube saY the inside wall of said WaterV leg, plug inj the outside' wall of saidwaterlegopposite forwardly. from saidwater leg above said plug to the throat.

`the endV of said tube, and a floor Textending l 2. A locomotive fire-boxhavirigv a transverse water leg `occluding its lower forward portion behind the ythroat with passage thereover for' the products ofl combustion, arch tubes extending rearwardly and upwardly from the upperportion of the'insidey wall of saidfwater leg,y arch tube plugs in` the outside Wall of said' water leg oppositeV the ends 'of saidv tube's,an upwardly and ioo rearwardly `extending refractory arch on said tubes, anda refractory floor extending. forwardly and downwardly from the outer wall of said water leg above saidplugs toy the throat, the portion of the fire-box above. said arch, water leg and yfloor constitutingl in effect a substantiallyy continuously wardly expanding final zone of combustion. Y

3.-A combined wide andY narrow locomo-A tive lire-box with4 its transverse water leg between the wide and narrow portions in-k clined, with a tube-supported lire arch exV tending from said transverse water leg rear:v ward and upward in the lire* box, and with the refractoryloor'of `thenarrow portion extending from said transverse water leg above its arch tube plugs forwardand downsheetV below theV boiler'v fiues. 'i'

4. A combined wide and narrow locomo- Vtive fire-boxrwith aplu'rality of tube-sup ported arches extending rearward from, its

transverse water leg and affordingV passage Y for the A combustion Y gases between them y.

transversely of the fire-box, and with the floor of the narrowportion inclinedl and extending from said Vtransverse water leg above its archtubev plugs forward and :down- Y Ward to thef thproatpsheetfbelow the boiler u flues.

1,665,3394 *Y v v a 5. A'combined wide and narrow looomothe narrow portion extending from said l tive fire-box with its transverse water leg transverse water leg above its arch tube between the wide and narrow portions inplugs to the throat sheet below the "boiler 10v elined, with a plurality of tube-supported iues.

5 arches yextending rearward fron] said water In testimony whereof, I have hereunto leg and affording passage between them for signed my name. l K thecombustion gases, and with` the Hoor of v JAMES T. ANTHONY. 

